// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "content/browser/process_internals/process_internals_ui.h"

#include <memory>

#include "base/bind.h"
#include "base/macros.h"
#include "content/grit/content_resources.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_ui.h"
#include "content/public/browser/web_ui_data_source.h"
#include "content/public/browser/web_ui_message_handler.h"
#include "content/public/common/bindings_policy.h"
#include "content/public/common/url_constants.h"

#include "content/browser/process_internals/process_internals.mojom.h"
#include "content/browser/process_internals/process_internals_handler_impl.h"

#include "content/public/common/bindings_policy.h"
#include "mojo/public/cpp/bindings/binding.h"

namespace content {

ProcessInternalsUI::ProcessInternalsUI(WebUI* web_ui)
    : WebUIController(web_ui), WebContentsObserver(web_ui->GetWebContents()) {
  // Grant only Mojo WebUI bindings, since this WebUI will not use
  // chrome.send().
  web_ui->SetBindings(content::BINDINGS_POLICY_MOJO_WEB_UI);

  // Create a WebUIDataSource to serve the HTML/JS files to the WebUI.
  WebUIDataSource* source =
      WebUIDataSource::Create(kChromeUIProcessInternalsHost);

  source->AddResourcePath("process_internals.js", IDR_PROCESS_INTERNALS_JS);
  source->AddResourcePath("process_internals.css", IDR_PROCESS_INTERNALS_CSS);
  source->AddResourcePath("process_internals.mojom-lite.js",
                          IDR_PROCESS_INTERNALS_MOJO_JS);
  source->SetDefaultResource(IDR_PROCESS_INTERNALS_HTML);

  WebUIDataSource::Add(web_contents()->GetBrowserContext(), source);

  AddHandlerToRegistry(
      base::BindRepeating(&ProcessInternalsUI::BindProcessInternalsHandler,
                          base::Unretained(this)));
}

ProcessInternalsUI::~ProcessInternalsUI() = default;

void ProcessInternalsUI::BindProcessInternalsHandler(
    ::mojom::ProcessInternalsHandlerRequest request,
    RenderFrameHost* render_frame_host) {
  ui_handler_ = std::make_unique<ProcessInternalsHandlerImpl>(
      render_frame_host->GetSiteInstance()->GetBrowserContext(),
      std::move(request));
}

void ProcessInternalsUI::OnInterfaceRequestFromFrame(
    RenderFrameHost* render_frame_host,
    const std::string& interface_name,
    mojo::ScopedMessagePipeHandle* interface_pipe) {
  // This should not be requested by subframes, so terminate the renderer if
  // it issues such a request.
  if (render_frame_host->GetParent()) {
    render_frame_host->GetProcess()->ShutdownForBadMessage(
        content::RenderProcessHost::CrashReportMode::GENERATE_CRASH_DUMP);
    return;
  }

  registry_.TryBindInterface(interface_name, interface_pipe, render_frame_host);
}

}  // namespace content